JVC AV-20NMG3B, AV-20N3/D, AV-20NMG3/-A SUB Bright, Ad justment Remote, Sub, SUB Colour Ⅰ

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AV-20N3

AV-20NMG3

AV-20NMG3B

Item

Measuring

Test point

Ad justment part

 

Description

instrument

 

 

 

 

 

 

 

 

 

 

 

 

 

Ad justment

Remote

 

3.

BRIGHT

1. Receive any broadcast.

of

control unit

 

 

 

2. Enter the SERVICE MENU.

 

 

 

 

SUB BRIGHT

 

 

 

 

3. Select 2. V/C from SERVICE MENU.

 

 

 

 

 

4.

Select 3. BRIGHT with the MENU /key.

 

 

 

 

 

5.

Set the initial setting value with the MENU - / + key.

 

 

 

 

 

6.

If the brightness is not the best with the initial set value, make

 

 

 

 

 

 

fine adjustment until you get the best brightness.

 

 

 

 

 

 

Ad justment

Remote

 

4.

CONT .

1. Receive any broadcast.

of

control unit

 

 

 

2. Enter the SERVICE MENU.

 

 

 

 

SUB CONT.

 

 

 

 

3. Select 2. V/C from SERVICE MENU.

 

 

 

 

 

4.

Select 4. CONT. with the MENU /key.

 

 

 

 

 

5.

Set the initial setting value with the MENU - / + key.

 

 

 

 

 

6.

If the contrast is not the best with the initial set value, make fine

 

 

 

 

 

 

adjustment until you get the best contrast.

 

 

 

 

 

 

Ad justment

Remote

 

5.

COLOUR

[Method of adjustment without measuring instrument]

of

control unit

 

 

 

 

 

 

 

 

 

 

 

SUB

 

 

 

 

 

 

COLOUR

 

 

PAL COLOUR

1. Receive a PAL broadcast.

 

 

 

 

 

2.

Enter the SERVICE MENU.

 

 

 

 

 

3.

Select 2. V/C from the SERVICE MENU.

 

 

 

 

 

4.

Select 5. COLOUR with the MENU /key.

 

 

 

 

 

5.

Set the initial setting value for PAL COLOUR with the MENU

 

 

 

 

 

 

- / + key.

 

 

 

 

 

6.

If the colour is not the best with the initial set value, make fine

 

 

 

 

 

 

adjustment until you get the best colour.

 

 

 

 

 

 

 

SECAM COLOUR

1.Receive a SECAM broadcast.

2.Make fine adjustment of SECAM COLOUR as previously.

NTSC 3.58 COLOUR

1.Receive a NTSC 3.58MHz broadcast.

2.Make similar fine adjustment of NTSC 3.58 COLOUR as previously.

NTSC 4.43 COLOUR

When NTSC 3.58 adjustment completed, NTSC 4.43 will be automatically set at the respective values.

No. 52025

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Contents Contents AV-20NMG3 SpecificationsEnts AV-20N3Safety Precautions VIDEO/CHROMA Decorder SCL 1/SDA1 FeaturesMemory SCL 2/SDA2 Micro ComputerFront Panel Rear Terminal FunctionsRemote Control Unit Model Name Main Difference ListPart Name Disassembly Procedure Specific Service InstructionsSpeaker System CONSTANT-Ⅱ KEY Assignment of Remote Control UnitService Menu System CONSTANT-ⅠSetting item Setting value Setting of System Constant SETSetting item Setting contents User Setting ValuesInitial Setting Value of Service Menu PAL Secam PresetSound System Do Not Adjust Setting item Locations of Front Panel Buttons and LAM PS Replacement of IC301 if V/C DecoderProcedures Measuring Instrument and Fixtures Service AdjustmentsBefore Starting Service Adjustment Adjustment ItemsKEY Assignment of Remote Control Unit Service Menu Basic Operation of Service MenuShould be OFF Method of settingC, 3.DEF and 4.VSM Preset Setup TourService Menu Flow Chart Upperfocus Adjustment LocationsSolder Side TOPIf Circuit Adjustment AdjustmentsB1 Power Supply Focus AdjustmentAGC Take Over Other Delay PointPoint AGCVideo / Chroma Circuit Adjustment SUB Method of adjustment without measuring instrumentSUB Bright Ad justment RemoteColour Ⅱ Socket TintCRT BL ACK BL AdjustAd justment part Description Remote Secam Control unitPosition Deflection Circuit AdjustmentTOP VSM Preset SettingVER. Scurve Scurve# P/C Magnets Purity / Convergence AdjustmentPurity Adjustment Dynamic Convergence Adjustment Static Convergence AdjustmentSoldering Iron Replacement of Chip ComponentReplacement Steps AV-20N3 AV-20NMG3 AV-20NMG3B